NEC uPD78P078 - Manual (Page 127)

127
CHAPTER 5 CPU ARCHITECTURE
5.4.6 Register indirect addressing
[Function]
The memory is addressed with the contents of the register pair specified as an operand. The register pair to
be accessed is specified with the register bank select flag (RBS0 and RBS1) and the register pair specify code
in the instruction code. This addressing can be carried out for all the memory spaces.
[Operand format]
Identifier Description
— [DE], [HL]
[Description example]
MOV A, [DE]; when selecting [DE] as register pair
Operation code 1 0 0 0 0 1 0 1
[Illustration]
16 0 8
D
7
E
Memory The contents of addressed
memory are transferred
Memory address specified
by register pair DE
0 7
7 0
A
DE